Alert archive / New Jersey / Special Marine Warnings in 2021

Special Marine Warning 142, NWS Philadelphia/Mount Holly

November 13, 2021

NWS Philadelphia/Mount Holly issued this special marine warning at Nov 13, 2021, 2:06 PM EST. It was in force for 54 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Nov 13, 2021, 2:06 PM EST (19:06 UTC)
Expired: Nov 13, 2021, 3:00 PM EST
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 0.75 in
Wind: 49.0 mph

The radar

The Philadelphia radar (KDIX), 50 km from the middle of the area, began a volume at 19:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Nov 13, 2:16 PM EST	HAIL 0.75	2 Ese Ramtown, NJ	MPING REPORT.
Nov 13, 2:23 PM EST	HAIL 0.25	Asbury Park, NJ
Nov 13, 2:25 PM EST	HAIL 0.25	Point Pleasant, NJ
Nov 13, 2:25 PM EST	HAIL 0.5	Brick, NJ
Nov 13, 2:40 PM EST	HAIL 0.25	Manasquan, NJ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.1 hours before the alert went out and 117 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1435 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

840 
WHUS51 KPHI 131906
SMWPHI
ANZ450-451-470-132000-
/O.NEW.KPHI.MA.W.0142.211113T1906Z-211113T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
206 PM EST Sat Nov 13 2021

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  Coastal waters from Sandy Hook to Little Egg Inlet NJ out 20 nm...
  Outer waters from Sandy Hook to Manasquan Inlet NJ out 20 to 40
  nm...

* Until 300 PM EST.

* At 206 PM EST, a severe thunderstorm was located 7 nm west of Point
  Pleasant Beach, or 7 nm northwest of Silverton, moving northeast at
  55 knots.

  HAZARD...Wind gusts to nearly 50 knots and large hail.

  SOURCE...Radar.

  IMPACT...Small craft could be damaged in briefly higher winds and 
           suddenly higher waves. Large hail could result in 
           structural damage.

* Locations impacted include...
  Sea Girt Reef, Shark River Reef, Point Pleasant Beach, Belmar,
  Manasquan Inlet, Monmouth Beach, Sea Bright, Axel Carlson Reef and
  Sandy Hook Reef.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

&&

LAT...LON 4041 7393 4026 7365 4017 7357 4009 7357
      4004 7405 4000 7416 4003 7417 4018 7406
      4027 7405 4032 7406
TIME...MOT...LOC 1906Z 220DEG 59KT 4012 7420 

HAIL...>.75IN
WIND...49KTS

$$

SFJ

3 follow-up statements

097 
FZUS71 KPHI 131929
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
229 PM EST Sat Nov 13 2021

ANZ450-451-470-132000-
/O.CON.KPHI.MA.W.0142.000000T0000Z-211113T2000Z/
229 PM EST Sat Nov 13 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 300 PM EST...

For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...

At 229 PM EST, a severe thunderstorm capable of producing waterspouts
was located near Sandy Hook Reef, moving northeast at 60 knots.

HAZARD...Waterspouts, wind gusts to nearly 50 knots, and large hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally 
         hazardous seas. Small craft could be damaged in briefly 
         higher winds and suddenly higher waves. Large hail could 
         result in structural damage.

Locations impacted include...
Sea Girt Reef, Shark River Reef, Point Pleasant Beach, Belmar,
Manasquan Inlet, Monmouth Beach, Sea Bright, Axel Carlson Reef and
Sandy Hook Reef.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.

&&

LAT...LON 4041 7393 4026 7365 4017 7357 4009 7357
      4004 7409 4018 7406 4025 7400 4037 7398
TIME...MOT...LOC 1929Z 220DEG 59KT 4042 7387 

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...49KTS

$$

SFJ

214 
FZUS71 KPHI 131938
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
238 PM EST Sat Nov 13 2021

ANZ450-451-470-132000-
/O.CON.KPHI.MA.W.0142.000000T0000Z-211113T2000Z/
238 PM EST Sat Nov 13 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 300 PM EST...

For the following areas...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm...
Waters from Sandy Hook NJ to Manasquan Inlet NJ out 20 to 40 nm...

At 237 PM EST, a severe thunderstorm capable of producing waterspouts
was located 8 nm southwest of Entrance to New York Harbor, moving
east at 35 knots.

HAZARD...Waterspouts, wind gusts to nearly 50 knots, and large hail.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally 
         hazardous seas. Small craft could be damaged in briefly 
         higher winds and suddenly higher waves. Large hail could 
         result in structural damage.

Locations impacted include...
Sea Girt Reef, Shark River Reef, Axel Carlson Reef and Sandy Hook
Reef.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor until hazardous weather passes.

Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.

&&

LAT...LON 4041 7393 4026 7365 4017 7357 4009 7357
      4004 7404 4023 7398 4039 7396
TIME...MOT...LOC 1937Z 258DEG 37KT 4027 7382 

WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...49KTS

$$

SFJ

523 
FZUS71 KPHI 131950
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
250 PM EST Sat Nov 13 2021

ANZ450-451-470-132000-
/O.EXP.KPHI.MA.W.0142.000000T0000Z-211113T2000Z/
250 PM EST Sat Nov 13 2021

...THE SPECIAL MARINE WARNING WILL EXPIRE AT 300 PM EST...

The affected areas were... 
Coastal waters from Sandy Hook to Little Egg Inlet NJ out 20 nm...
Outer waters from Sandy Hook to Manasquan Inlet NJ out 20 to 40 nm...

The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.

A Severe Thunderstorm Watch remains in effect until 700 PM EST for
the adjacent coastal waters.

LAT...LON 4041 7393 4026 7365 4017 7357 4009 7357
      4004 7404 4023 7398 4039 7396
TIME...MOT...LOC 1950Z 220DEG 59KT 4042 7365 

$$

SFJ

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 13, 2:55 AM EST	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more	14 hr
Nov 13, 12:22 PM EST	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	53 min
Nov 13, 1:15 PM EST	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	13 min
Nov 13, 1:51 PM EST	Severe Thunderstorm Warning	PHI	Middlesex	9 min
Nov 13, 2:04 PM EST	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	41 min
Nov 13, 2:21 PM EST	Severe Thunderstorm Warning	PHI	Ocean	24 min
Nov 13, 2:22 PM EST	Special Marine Warning	PHI		53 min
Nov 13, 2:57 PM EST	Special Marine Warning	PHI		20 min
Nov 13, 6:59 PM EST	Small Craft Advisory	PHI		11 hr
Nov 13, 2:11 PM EST	Freeze Warning	PHI	Sussex	19 hr

Nearby

Special Marine Warnings in New Jersey, 2021 Every special marine warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.